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vdr/libdtv/libsi/si_parser.c
Klaus Schmidinger 8465398c6d Version 0.97 
- Implemented a lock file to prevent more than one instance of VDR from removing
  files from the video directory at the same time.
- The new setup parameter SplitEditedFiles can be used to control whether or
  not the result of an editing process shall be written into separate files.
- Fixed handling repeat function when using LIRC (thanks to Matthias Weingart).
- The shutdown program (defined with the '-s' option) now also gets the channel
  number and recording title of the timer (see INSTALL).
- New channel data for 'Premiere One', 'Premiere X-Action', 'Fox Kids Türkce'
  and 'N24' (thanks to Andreas Share, Ulrich Röder, Uwe Scheffler and Simon
  Bauschulte). Note that if you are using the default 'channels.conf' or
  'channels.conf.cable' files you may need to check any exiting timers to see
  whether they still use the correct channel number.
- Fixed the "EPG bugfix" (sometimes had duplicate information in Subtitle and
  Extended Description).
- Fixed checking for valid video device when setting the video mode.
- The external command 'sort' is no longer required. VDR now sorts the list of
  recordings itself, making sure that recordings that stem from repeating timers
  are sorted chronologically. Sorting is done according to the setting of the
  current locale, so you may want to make sure LC_COLLATE is set to the desired
  value (see INSTALL).
- Fixed handling 'newline' characters in EPG texts (thanks to Rolf Hakenes for
  an improved version of his 'libdtv').
  Newline characters are always mapped to a single "blank" in VDR, because they
  would otherwise disturb the Title and Subtitle layout in the channel display
  (where these are assumed to be single line texts) and would have to be
  specially handled in the 'epg.data' file and the LSTE command in SVDRP.
- Mapping ` ("backtick") characters in EPG texts to ' (single quote).
- Fixed timers starting and ending at unexpected times. 'localtime()' was not
  thread safe, now using localtime_r().
- Removed the "system time seen..." message.
- Fixed a bug in the replay mode display when pressing the Green or Yellow
  button while in trick mode (thanks to Stefan Huelswitt)
- Closing all open file descriptors when calling external programs.
- The menu timeout now also works when pressing the "Back" button during replay
  to enter the "Recordings" menu.
- Updated 'channels.conf' for the "Bundesliga" channels of Premiere World
  (thanks to Helmut Schächner).
- Fixed reading timers.conf and channels.conf that contain blanks after numeric
  values.
- Fixed handling trick modes near the beginning and end of a recording.
- Pressing the "Back" button while replaying a DVD now leads to the DVD menu.
2001-10-21 18:00:00 +02:00

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//////////////////////////////////////////////////////////////
/// ///
/// si_parser.c: main parsing functions of libsi ///
/// ///
//////////////////////////////////////////////////////////////
// $Revision: 1.4 $
// $Date: 2001/10/07 10:24:46 $
// $Author: hakenes $
//
// (C) 2001 Rolf Hakenes <hakenes@hippomi.de>, under the GNU GPL.
//
// libsi is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
//
// libsi is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You may have received a copy of the GNU General Public License
// along with libsi; see the file COPYING. If not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#include <stdio.h>
#include <math.h>
#include <time.h>
#include "../liblx/liblx.h"
#include "libsi.h"
#include "si_tables.h"
struct LIST *siParsePAT (u_char *Buffer)
{
pat_t *Pat;
pat_prog_t *PatProgram;
u_char *Ptr;
u_int SectionLength;
int TransportStreamID;
int PatVersion;
struct Program *Program;
struct LIST *ProgramList = NULL;
if (!Buffer) return NULL;
Pat = (pat_t *) Buffer; Ptr = Buffer;
if (Pat->table_id != TID_PAT) {
// fprintf (stderr, "PAT: wrong TID %d\n", Pat->table_id);
return NULL;
}
SectionLength = HILO (Pat->section_length) + 3 - PAT_LEN - 4;
if (crc32 (Ptr, HILO (Pat->section_length) + 3)) return (NULL);
TransportStreamID = HILO (Pat->transport_stream_id);
PatVersion = Pat->version_number;
Ptr += PAT_LEN;
while (SectionLength > 0)
{
PatProgram = (pat_prog_t *) Ptr;
CreateProgram (Program, HILO (PatProgram->program_number),
TransportStreamID, HILO (PatProgram->network_pid), PatVersion);
if (!ProgramList) ProgramList = xNewList (NULL);
xAddTail (ProgramList, Program);
SectionLength -= PAT_PROG_LEN;
Ptr += PAT_PROG_LEN;
}
return (ProgramList);
}
struct Pid *siParsePMT (u_char *Buffer)
{
pmt_t *Pmt;
pmt_info_t *PmtInfo;
u_char *Ptr;
u_int SectionLength, ProgramInfoLength,
StreamLength, LoopLength;
int ProgramID;
int PcrID;
int PmtVersion;
struct Pid *Pid;
struct PidInfo *PidInfo;
if (!Buffer) return NULL;
Pmt = (pmt_t *) Buffer; Ptr = Buffer;
if (Pmt->table_id != TID_PMT) {
// fprintf (stderr, "PMT: wrong TID %d\n", Pmt->table_id);
return NULL;
}
SectionLength = HILO (Pmt->section_length) + 3 - 4;
if (crc32 (Ptr, HILO (Pmt->section_length) + 3)) return (NULL);
ProgramInfoLength = HILO (Pmt->program_info_length);
StreamLength = SectionLength - ProgramInfoLength - PMT_LEN;
ProgramID = HILO (Pmt->program_number);
PmtVersion = Pmt->version_number;
PcrID = HILO (Pmt->PCR_PID);
Ptr += PMT_LEN;
CreatePid (Pid, ProgramID, PcrID, PmtVersion);
siParseDescriptors (Pid->Descriptors, Ptr, ProgramInfoLength, Pmt->table_id);
Ptr += ProgramInfoLength;
while (StreamLength > 0)
{
PmtInfo = (pmt_info_t *) Ptr;
CreatePidInfo (PidInfo, PmtInfo->stream_type,
HILO (PmtInfo->elementary_PID));
LoopLength = HILO (PmtInfo->ES_info_length);
Ptr += PMT_INFO_LEN;
siParseDescriptors (PidInfo->Descriptors, Ptr, LoopLength, Pmt->table_id);
xAddTail (Pid->InfoList, PidInfo);
StreamLength -= LoopLength + PMT_INFO_LEN;
Ptr += LoopLength;
}
return (Pid);
}
struct LIST *siParseSDT (u_char *Buffer)
{
sdt_t *Sdt;
sdt_descr_t *SdtDescriptor;
u_char *Ptr;
u_int SectionLength, LoopLength;
int TransportStreamID;
int SdtVersion;
int OriginalNetworkID;
struct Service *Service;
struct LIST *ServiceList = NULL;
if (!Buffer) return NULL;
Sdt = (sdt_t *) Buffer; Ptr = Buffer;
if (Sdt->table_id != TID_SDT_ACT && Sdt->table_id != TID_SDT_OTH) {
// fprintf (stderr, "SDT: wrong TID %d\n", Sdt->table_id);
return NULL;
}
SectionLength = HILO (Sdt->section_length) + 3 - SDT_LEN - 4;
if (crc32 (Ptr, HILO (Sdt->section_length) + 3)) return (NULL);
TransportStreamID = HILO (Sdt->transport_stream_id);
SdtVersion = Sdt->version_number;
OriginalNetworkID = HILO (Sdt->original_network_id);
Ptr += SDT_LEN;
while (SectionLength > 0)
{
SdtDescriptor = (sdt_descr_t *) Ptr;
CreateService (Service, HILO (SdtDescriptor->service_id),
TransportStreamID, OriginalNetworkID, SdtVersion,
SdtDescriptor->free_ca_mode ? CONDITIONAL_ACCESS : FREE_TO_AIR);
switch (SdtDescriptor->running_status)
{
case 0x01:
SetRunningStatus (Service->Status, RUNNING_STATUS_NOT_RUNNING);
break;
case 0x02:
SetRunningStatus (Service->Status, RUNNING_STATUS_AWAITING);
break;
case 0x03:
SetRunningStatus (Service->Status, RUNNING_STATUS_PAUSING);
break;
case 0x04:
default:
SetRunningStatus (Service->Status, RUNNING_STATUS_RUNNING);
break;
}
if (SdtDescriptor->eit_schedule_flag)
SetScheduleFlag (Service->Status);
if (SdtDescriptor->eit_present_following_flag)
SetPresentFollowing (Service->Status);
LoopLength = HILO (SdtDescriptor->descriptors_loop_length);
Ptr += SDT_DESCR_LEN;
siParseDescriptors (Service->Descriptors, Ptr, LoopLength, Sdt->table_id);
if (!ServiceList) ServiceList = xNewList (NULL);
xAddTail (ServiceList, Service);
SectionLength -= LoopLength + SDT_DESCR_LEN;
Ptr += LoopLength;
}
return (ServiceList);
}
struct LIST *siParseEIT (u_char *Buffer)
{
eit_t *Eit;
eit_event_t *EitEvent;
u_char *Ptr;
u_int SectionLength, LoopLength;
int ServiceID;
int EitVersion;
int TransportStreamID;
int OriginalNetworkID;
struct Event *Event;
struct LIST *EventList = NULL;
if (!Buffer) return NULL;
Eit = (eit_t *) Buffer; Ptr = Buffer;
if (Eit->table_id != TID_EIT_ACT && Eit->table_id != TID_EIT_OTH &&
!(Eit->table_id >= TID_EIT_ACT_SCH &&
Eit->table_id <= TID_EIT_ACT_SCH + 0x0F) &&
!(Eit->table_id >= TID_EIT_OTH_SCH &&
Eit->table_id <= TID_EIT_OTH_SCH + 0x0F)) {
// fprintf (stderr, "EIT: wrong TID %d\n", Eit->table_id);
return NULL;
}
SectionLength = HILO (Eit->section_length) + 3 - EIT_LEN - 4;
if (crc32 (Ptr, HILO (Eit->section_length) + 3)) return (NULL);
ServiceID = HILO (Eit->service_id);
TransportStreamID = HILO (Eit->transport_stream_id);
EitVersion = Eit->version_number;
OriginalNetworkID = HILO (Eit->original_network_id);
Ptr += EIT_LEN;
while (SectionLength > 0)
{
struct tm thisTime;
int year, month, day;
double mjd;
EitEvent = (eit_event_t *) Ptr;
CreateEvent (Event, HILO (EitEvent->event_id), ServiceID,
TransportStreamID, OriginalNetworkID, EitVersion,
EitEvent->free_ca_mode ? CONDITIONAL_ACCESS : FREE_TO_AIR);
switch (EitEvent->running_status)
{
case 0x01:
SetRunningStatus (Event->Status, RUNNING_STATUS_NOT_RUNNING);
break;
case 0x02:
SetRunningStatus (Event->Status, RUNNING_STATUS_AWAITING);
break;
case 0x03:
SetRunningStatus (Event->Status, RUNNING_STATUS_PAUSING);
break;
case 0x04:
default:
SetRunningStatus (Event->Status, RUNNING_STATUS_RUNNING);
break;
}
Event->StartTime = MjdToEpochTime (EitEvent->mjd) +
BcdTimeToSeconds (EitEvent->start_time);
Event->Duration = BcdTimeToSeconds (EitEvent->duration);
LoopLength = HILO (EitEvent->descriptors_loop_length);
Ptr += EIT_EVENT_LEN;
siParseDescriptors (Event->Descriptors, Ptr, LoopLength, Eit->table_id);
if (!EventList) EventList = xNewList (NULL);
xAddTail (EventList, Event);
SectionLength -= LoopLength + EIT_EVENT_LEN;
Ptr += LoopLength;
}
return (EventList);
}
time_t siParseTDT (u_char *Buffer)
{
tdt_t *Tdt;
u_char *Ptr;
u_int SectionLength;
int TdtVersion;
time_t CurrentTime;
if (!Buffer) return 0;
Tdt = (tdt_t *) Buffer; Ptr = Buffer;
if (Tdt->table_id != TID_TDT) {
// fprintf (stderr, "TDT: wrong TID %d\n", Tdt->table_id);
return 0;
}
SectionLength = HILO (Tdt->section_length) + 3; /* no CRC ?! */
CurrentTime = MjdToEpochTime (Tdt->utc_mjd) +
BcdTimeToSeconds (Tdt->utc_time);
return (CurrentTime);
}
void siParseDescriptors (struct LIST *Descriptors, u_char *Buffer,
u_int Length, u_char TableID)
{
u_int DescriptorLength;
u_char *Ptr;
DescriptorLength = 0;
Ptr = Buffer;
while (DescriptorLength < Length)
{
switch (TableID)
{
case TID_NIT_ACT: case TID_NIT_OTH:
switch (GetDescriptorTag(Ptr))
{
case DESCR_NW_NAME:
case DESCR_SERVICE_LIST:
case DESCR_STUFFING:
case DESCR_SAT_DEL_SYS:
case DESCR_CABLE_DEL_SYS:
case DESCR_LINKAGE:
case DESCR_TERR_DEL_SYS:
case DESCR_ML_NW_NAME:
case DESCR_PRIV_DATA_SPEC:
case DESCR_CELL_LIST:
case DESCR_CELL_FREQ_LINK:
case DESCR_ANNOUNCEMENT_SUPPORT:
siParseDescriptor (Descriptors, Ptr);
break;
default:
/* fprintf (stderr, "forbidden descriptor 0x%x in NIT\n",
GetDescriptorTag(Ptr));*/
break;
}
break;
case TID_BAT:
switch (GetDescriptorTag(Ptr))
{
case DESCR_SERVICE_LIST:
case DESCR_STUFFING:
case DESCR_BOUQUET_NAME:
case DESCR_SERVICE:
case DESCR_COUNTRY_AVAIL:
case DESCR_LINKAGE:
case DESCR_CA_IDENT:
case DESCR_ML_BQ_NAME:
case DESCR_PRIV_DATA_SPEC:
siParseDescriptor (Descriptors, Ptr);
break;
default:
/*fprintf (stderr, "forbidden descriptor 0x%x in BAT\n",
GetDescriptorTag(Ptr));*/
break;
}
break;
case TID_SDT_ACT: case TID_SDT_OTH:
switch (GetDescriptorTag(Ptr))
{
case DESCR_STUFFING:
case DESCR_BOUQUET_NAME:
case DESCR_SERVICE:
case DESCR_COUNTRY_AVAIL:
case DESCR_LINKAGE:
case DESCR_NVOD_REF:
case DESCR_TIME_SHIFTED_SERVICE:
case DESCR_MOSAIC:
case DESCR_CA_IDENT:
case DESCR_TELEPHONE:
case DESCR_ML_SERVICE_NAME:
case DESCR_PRIV_DATA_SPEC:
case DESCR_DATA_BROADCAST:
siParseDescriptor (Descriptors, Ptr);
break;
default:
/* fprintf (stderr, "forbidden descriptor 0x%x in SDT\n",
GetDescriptorTag(Ptr)); */
break;
}
break;
case TID_EIT_ACT: case TID_EIT_OTH:
case TID_EIT_ACT_SCH: case TID_EIT_OTH_SCH:
case TID_EIT_ACT_SCH+1: case TID_EIT_OTH_SCH+1:
case TID_EIT_ACT_SCH+2: case TID_EIT_OTH_SCH+2:
case TID_EIT_ACT_SCH+3: case TID_EIT_OTH_SCH+3:
case TID_EIT_ACT_SCH+4: case TID_EIT_OTH_SCH+4:
case TID_EIT_ACT_SCH+5: case TID_EIT_OTH_SCH+5:
case TID_EIT_ACT_SCH+6: case TID_EIT_OTH_SCH+6:
case TID_EIT_ACT_SCH+7: case TID_EIT_OTH_SCH+7:
case TID_EIT_ACT_SCH+8: case TID_EIT_OTH_SCH+8:
case TID_EIT_ACT_SCH+9: case TID_EIT_OTH_SCH+9:
case TID_EIT_ACT_SCH+10: case TID_EIT_OTH_SCH+10:
case TID_EIT_ACT_SCH+11: case TID_EIT_OTH_SCH+11:
case TID_EIT_ACT_SCH+12: case TID_EIT_OTH_SCH+12:
case TID_EIT_ACT_SCH+13: case TID_EIT_OTH_SCH+13:
case TID_EIT_ACT_SCH+14: case TID_EIT_OTH_SCH+14:
case TID_EIT_ACT_SCH+15: case TID_EIT_OTH_SCH+15:
switch (GetDescriptorTag(Ptr))
{
case DESCR_STUFFING:
case DESCR_LINKAGE:
case DESCR_SHORT_EVENT:
case DESCR_EXTENDED_EVENT:
case DESCR_TIME_SHIFTED_EVENT:
case DESCR_COMPONENT:
case DESCR_CA_IDENT:
case DESCR_CONTENT:
case DESCR_PARENTAL_RATING:
case DESCR_TELEPHONE:
case DESCR_ML_COMPONENT:
case DESCR_PRIV_DATA_SPEC:
case DESCR_SHORT_SMOOTH_BUF:
case DESCR_DATA_BROADCAST:
case DESCR_PDC:
siParseDescriptor (Descriptors, Ptr);
break;
default:
/*fprintf (stderr, "forbidden descriptor 0x%x in EIT\n",
GetDescriptorTag(Ptr));*/
break;
}
break;
case TID_TOT:
switch (GetDescriptorTag(Ptr))
{
case DESCR_LOCAL_TIME_OFF:
siParseDescriptor (Descriptors, Ptr);
break;
default:
/*fprintf (stderr, "forbidden descriptor 0x%x in TOT\n",
GetDescriptorTag(Ptr));*/
break;
}
break;
case TID_PMT:
switch (GetDescriptorTag(Ptr))
{
case DESCR_VBI_DATA:
case DESCR_VBI_TELETEXT:
case DESCR_MOSAIC:
case DESCR_STREAM_ID:
case DESCR_TELETEXT:
case DESCR_SUBTITLING:
case DESCR_PRIV_DATA_SPEC:
case DESCR_SERVICE_MOVE:
case DESCR_CA_SYSTEM:
case DESCR_DATA_BROADCAST_ID:
case DESCR_AC3:
case DESCR_ANCILLARY_DATA:
case DESCR_VIDEO_STREAM:
case DESCR_AUDIO_STREAM:
case DESCR_HIERARCHY:
case DESCR_REGISTRATION:
case DESCR_DATA_STREAM_ALIGN:
case DESCR_TARGET_BACKGRID:
case DESCR_VIDEO_WINDOW:
case DESCR_CA:
case DESCR_ISO_639_LANGUAGE:
case DESCR_SYSTEM_CLOCK:
case DESCR_MULTIPLEX_BUFFER_UTIL:
case DESCR_COPYRIGHT:
case DESCR_MAXIMUM_BITRATE:
siParseDescriptor (Descriptors, Ptr);
break;
default:
/* fprintf (stderr, "forbidden descriptor 0x%x in PMT\n",
GetDescriptorTag(Ptr)); */
break;
}
break;
default:
fprintf (stderr, "descriptor 0x%x in unsupported table 0x%x\n",
GetDescriptorTag(Ptr), TableID);
break;
}
DescriptorLength += GetDescriptorLength (Ptr);
Ptr += GetDescriptorLength (Ptr);
}
return;
}
void siParseDescriptor (struct LIST *Descriptors, u_char *Buffer)
{
struct NODE *Descriptor = NULL;
char *Text , *Text2;
u_char *Ptr;
int Length, i;
if (!Descriptors || !Buffer) return;
Ptr = Buffer;
switch (GetDescriptorTag(Buffer))
{
case DESCR_ANCILLARY_DATA:
CreateAncillaryDataDescriptor (Descriptor,
CastAncillaryDataDescriptor(Buffer)->ancillary_data_identifier);
break;
case DESCR_BOUQUET_NAME:
Text = siGetDescriptorText (Buffer + DESCR_BOUQUET_NAME_LEN,
GetDescriptorLength (Buffer) - DESCR_BOUQUET_NAME_LEN);
CreateBouquetNameDescriptor (Descriptor, Text);
// xMemFree (Text);
break;
case DESCR_COMPONENT:
Text = siGetDescriptorText (Buffer + DESCR_COMPONENT_LEN,
GetDescriptorLength (Buffer) - DESCR_COMPONENT_LEN);
CreateComponentDescriptor (Descriptor,
CastComponentDescriptor(Buffer)->stream_content,
CastComponentDescriptor(Buffer)->component_type,
CastComponentDescriptor(Buffer)->component_tag,
CastComponentDescriptor(Buffer)->lang_code1,
CastComponentDescriptor(Buffer)->lang_code2,
CastComponentDescriptor(Buffer)->lang_code3, Text);
// xMemFree (Text);
break;
case DESCR_SERVICE:
Text = siGetDescriptorText (Buffer + DESCR_SERVICE_LEN,
CastServiceDescriptor(Buffer)->provider_name_length);
Text2 = siGetDescriptorText (Buffer + DESCR_SERVICE_LEN +
CastServiceDescriptor(Buffer)->provider_name_length + 1,
*((u_char *)(Buffer + DESCR_SERVICE_LEN +
CastServiceDescriptor(Buffer)->provider_name_length)));
CreateServiceDescriptor (Descriptor,
CastServiceDescriptor(Buffer)->service_type, Text, Text2);
// xMemFree (Text2);
break;
case DESCR_COUNTRY_AVAIL:
CreateCountryAvailabilityDescriptor (Descriptor,
CastCountryAvailabilityDescriptor(Buffer)->country_availability_flag);
Length = GetDescriptorLength (Buffer) - DESCR_COUNTRY_AVAILABILITY_LEN;
Ptr += DESCR_COUNTRY_AVAILABILITY_LEN;
while (Length > 0)
{ AddCountryAvailabilityCode(Descriptor,
Ptr[0], Ptr[1], Ptr[2]); Ptr += 3; Length -= 3; }
break;
case DESCR_SHORT_EVENT:
Text = siGetDescriptorText (Buffer + DESCR_SHORT_EVENT_LEN,
CastShortEventDescriptor(Buffer)->event_name_length);
Text2 = siGetDescriptorText (Buffer + DESCR_SHORT_EVENT_LEN +
CastShortEventDescriptor(Buffer)->event_name_length + 1,
*((u_char *)(Buffer + DESCR_SHORT_EVENT_LEN +
CastShortEventDescriptor(Buffer)->event_name_length)));
CreateShortEventDescriptor (Descriptor, Text,
CastShortEventDescriptor(Buffer)->lang_code1,
CastShortEventDescriptor(Buffer)->lang_code2,
CastShortEventDescriptor(Buffer)->lang_code3, Text2);
// xMemFree (Text);
break;
case DESCR_EXTENDED_EVENT:
Text = siGetDescriptorText (Buffer + DESCR_EXTENDED_EVENT_LEN +
CastExtendedEventDescriptor(Buffer)->length_of_items + 1,
*((u_char *)(Buffer + DESCR_EXTENDED_EVENT_LEN +
CastExtendedEventDescriptor(Buffer)->length_of_items)));
CreateExtendedEventDescriptor (Descriptor,
CastExtendedEventDescriptor(Buffer)->descriptor_number,
CastExtendedEventDescriptor(Buffer)->last_descriptor_number,
CastExtendedEventDescriptor(Buffer)->lang_code1,
CastExtendedEventDescriptor(Buffer)->lang_code2,
CastExtendedEventDescriptor(Buffer)->lang_code3, Text);
// xMemFree (Text);
Length = CastExtendedEventDescriptor(Buffer)->length_of_items;
Ptr += DESCR_EXTENDED_EVENT_LEN;
while (Length > 0)
{
Text = siGetDescriptorText (Ptr + ITEM_EXTENDED_EVENT_LEN,
CastExtendedEventItem(Ptr)->item_description_length);
Text2 = siGetDescriptorText (Ptr + ITEM_EXTENDED_EVENT_LEN +
CastExtendedEventItem(Ptr)->item_description_length + 1,
*((u_char *)(Ptr + ITEM_EXTENDED_EVENT_LEN +
CastExtendedEventItem(Ptr)->item_description_length)));
AddExtendedEventItem (Descriptor, Text2, Text);
// xMemFree (Text2);
Length -= ITEM_EXTENDED_EVENT_LEN + CastExtendedEventItem(Ptr)->item_description_length +
*((u_char *)(Ptr + ITEM_EXTENDED_EVENT_LEN +
CastExtendedEventItem(Ptr)->item_description_length)) + 1;
Ptr += ITEM_EXTENDED_EVENT_LEN + CastExtendedEventItem(Ptr)->item_description_length +
*((u_char *)(Ptr + ITEM_EXTENDED_EVENT_LEN +
CastExtendedEventItem(Ptr)->item_description_length)) + 1;
}
break;
case DESCR_CA_IDENT:
CreateCaIdentifierDescriptor (Descriptor,
(GetDescriptorLength(Buffer) - DESCR_CA_IDENTIFIER_LEN) / 2);
Length = GetDescriptorLength (Buffer) - DESCR_CA_IDENTIFIER_LEN;
Ptr += DESCR_CA_IDENTIFIER_LEN; i = 0;
while (Length > 0)
{ SetCaIdentifierID(Descriptor, i, *((u_short *) Ptr));
Length -= 2; Ptr += 2; i++; }
break;
case DESCR_CONTENT:
CreateContentDescriptor (Descriptor,
(GetDescriptorLength(Buffer) - DESCR_CONTENT_LEN) / 2);
Length = GetDescriptorLength (Buffer) - DESCR_CONTENT_LEN;
Ptr += DESCR_CONTENT_LEN; i = 0;
while (Length > 0)
{ SetContentID(Descriptor, i, CastContentNibble(Ptr)->content_nibble_level_1,
CastContentNibble(Ptr)->content_nibble_level_2,
CastContentNibble(Ptr)->user_nibble_1,
CastContentNibble(Ptr)->user_nibble_2);
Length -= 2; Ptr += 2; i++; }
break;
case DESCR_STUFFING:
/* intentionally ignored */
break;
case DESCR_PARENTAL_RATING:
CreateParentalRatingDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_PARENTAL_RATING_LEN;
Ptr += DESCR_PARENTAL_RATING_LEN; i = 0;
while (Length > 0)
{ AddParentalRating (Descriptor, CastParentalRating(Ptr)->lang_code1,
CastParentalRating(Ptr)->lang_code2, CastParentalRating(Ptr)->lang_code3,
CastParentalRating(Ptr)->rating);
Length -= PARENTAL_RATING_LEN; Ptr += PARENTAL_RATING_LEN; i++; }
break;
case DESCR_NVOD_REF:
CreateNvodReferenceDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_NVOD_REFERENCE_LEN;
Ptr += DESCR_NVOD_REFERENCE_LEN;
while (Length > 0)
{
AddNvodReferenceItem (Descriptor,
HILO (CastNvodReferenceItem(Ptr)->transport_stream_id),
HILO (CastNvodReferenceItem(Ptr)->original_network_id),
HILO (CastNvodReferenceItem(Ptr)->service_id));
Length -= ITEM_NVOD_REFERENCE_LEN;
Ptr += ITEM_NVOD_REFERENCE_LEN;
}
break;
case DESCR_TIME_SHIFTED_SERVICE:
CreateTimeShiftedServiceDescriptor (Descriptor,
HILO (CastTimeShiftedServiceDescriptor(Ptr)->reference_service_id));
break;
case DESCR_TIME_SHIFTED_EVENT:
CreateTimeShiftedEventDescriptor (Descriptor,
HILO (CastTimeShiftedEventDescriptor(Ptr)->reference_service_id),
HILO (CastTimeShiftedEventDescriptor(Ptr)->reference_event_id));
break;
case DESCR_ISO_639_LANGUAGE:
CreateIso639LanguageDescriptor (Descriptor,
CastIso639LanguageDescriptor(Buffer)->lang_code1,
CastIso639LanguageDescriptor(Buffer)->lang_code2,
CastIso639LanguageDescriptor(Buffer)->lang_code3);
break;
case DESCR_STREAM_ID:
CreateStreamIdentifierDescriptor (Descriptor,
CastStreamIdentifierDescriptor(Ptr)->component_tag);
break;
case DESCR_LINKAGE:
CreateLinkageDescriptor (Descriptor,
HILO (CastLinkageDescriptor(Ptr)->transport_stream_id),
HILO (CastLinkageDescriptor(Ptr)->original_network_id),
HILO (CastLinkageDescriptor(Ptr)->service_id),
CastLinkageDescriptor(Ptr)->linkage_type,
GetDescriptorLength (Ptr) - DESCR_LINKAGE_LEN,
Ptr + DESCR_LINKAGE_LEN);
break;
case DESCR_TELETEXT:
CreateTeletextDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_TELETEXT_LEN;
Ptr += DESCR_TELETEXT_LEN;
while (Length > 0)
{
AddTeletextItem (Descriptor,
CastTeletextItem(Ptr)->type,
CastTeletextItem(Ptr)->magazine_number,
CastTeletextItem(Ptr)->page_number,
CastTeletextItem(Ptr)->lang_code1,
CastTeletextItem(Ptr)->lang_code2,
CastTeletextItem(Ptr)->lang_code3);
Length -= ITEM_TELETEXT_LEN;
Ptr += ITEM_TELETEXT_LEN;
}
break;
case DESCR_AC3:
CreateAc3Descriptor (Descriptor);
Length = GetDescriptorLength (Buffer);
if (CastAc3Descriptor(Buffer)->ac3_type_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
AC3_TYPE_FLAG, CastAc3Descriptor(Buffer)->ac3_type); }
if (CastAc3Descriptor(Buffer)->bsid_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
BS_ID_FLAG, CastAc3Descriptor(Buffer)->bsid); }
if (CastAc3Descriptor(Buffer)->mainid_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
MAIN_ID_FLAG, CastAc3Descriptor(Buffer)->mainid); }
if (CastAc3Descriptor(Buffer)->asvc_flag)
{ Length -= 1; Ptr += 1; AddAc3FlagAndValue (Descriptor,
ASVC_FLAG, CastAc3Descriptor(Buffer)->asvc); }
Length -= DESCR_AC3_LEN;
Ptr += DESCR_AC3_LEN;
if (Length) AddAc3AdditionalData (Descriptor, Ptr, Length);
break;
case DESCR_SUBTITLING:
CreateSubtitlingDescriptor (Descriptor);
Length = GetDescriptorLength (Buffer) - DESCR_SUBTITLING_LEN;
Ptr += DESCR_SUBTITLING_LEN;
while (Length > 0)
{
AddSubtitlingItem (Descriptor,
CastSubtitlingItem(Ptr)->subtitling_type,
HILO (CastSubtitlingItem(Ptr)->composition_page_id),
HILO (CastSubtitlingItem(Ptr)->ancillary_page_id),
CastSubtitlingItem(Ptr)->lang_code1,
CastSubtitlingItem(Ptr)->lang_code2,
CastSubtitlingItem(Ptr)->lang_code3);
Length -= ITEM_SUBTITLING_LEN;
Ptr += ITEM_SUBTITLING_LEN;
}
break;
case DESCR_VIDEO_STREAM:
case DESCR_AUDIO_STREAM:
case DESCR_HIERARCHY:
case DESCR_REGISTRATION:
case DESCR_DATA_STREAM_ALIGN:
case DESCR_TARGET_BACKGRID:
case DESCR_VIDEO_WINDOW:
case DESCR_CA:
case DESCR_SYSTEM_CLOCK:
case DESCR_MULTIPLEX_BUFFER_UTIL:
case DESCR_COPYRIGHT:
case DESCR_MAXIMUM_BITRATE:
case DESCR_PRIVATE_DATA_IND:
case DESCR_SMOOTHING_BUFFER:
case DESCR_STD:
case DESCR_IBP:
case DESCR_NW_NAME:
case DESCR_SERVICE_LIST:
case DESCR_SAT_DEL_SYS:
case DESCR_CABLE_DEL_SYS:
case DESCR_VBI_DATA:
case DESCR_VBI_TELETEXT:
case DESCR_MOSAIC:
case DESCR_TELEPHONE:
case DESCR_LOCAL_TIME_OFF:
case DESCR_TERR_DEL_SYS:
case DESCR_ML_NW_NAME:
case DESCR_ML_BQ_NAME:
case DESCR_ML_SERVICE_NAME:
case DESCR_ML_COMPONENT:
case DESCR_PRIV_DATA_SPEC:
case DESCR_SERVICE_MOVE:
case DESCR_SHORT_SMOOTH_BUF:
case DESCR_FREQUENCY_LIST:
case DESCR_PARTIAL_TP_STREAM:
case DESCR_DATA_BROADCAST:
case DESCR_CA_SYSTEM:
case DESCR_DATA_BROADCAST_ID:
case DESCR_TRANSPORT_STREAM:
case DESCR_DSNG:
case DESCR_PDC:
case DESCR_CELL_LIST:
case DESCR_CELL_FREQ_LINK:
case DESCR_ANNOUNCEMENT_SUPPORT:
default:
/* fprintf (stderr, "unsupported descriptor 0x%x\n",
GetDescriptorTag(Buffer)); */
break;
}
if (Descriptor) xAddTail (Descriptors, Descriptor);
return;
}
/*
* ToDo: ETSI conformal text definition
*/
char *siGetDescriptorText (u_char *Buffer, u_int Length)
{
char *tmp, *result;
int i;
if (*Buffer == 0x05 || (*Buffer >= 0x20 && *Buffer <= 0xff))
{
xMemAlloc (Length+1, &result);
tmp = result;
for (i = 0; i < Length; i++)
{
if (*Buffer == 0) break;
if ((*Buffer >= ' ' && *Buffer <= '~') ||
(*Buffer == '\n') ||
(*Buffer >= 0xa0 && *Buffer <= 0xff)) *tmp++ = *Buffer;
if (*Buffer == 0x8A) *tmp++ = '\n';
if (*Buffer == 0x86 || *Buffer == 0x87) *tmp++ = ' ';
Buffer++;
}
*tmp = '\0';
}
else
{
switch (*Buffer)
{
case 0x01: result = xSetText ("Coding according to character table 1"); break;
case 0x02: result = xSetText ("Coding according to character table 2"); break;
case 0x03: result = xSetText ("Coding according to character table 3"); break;
case 0x04: result = xSetText ("Coding according to character table 4"); break;
case 0x10: result = xSetText ("Coding according to ISO/IEC 8859"); break;
case 0x11: result = xSetText ("Coding according to ISO/IEC 10646"); break;
case 0x12: result = xSetText ("Coding according to KSC 5601"); break;
default: result = xSetText ("Unknown coding"); break;
}
}
return (result);
}
// CRC32 lookup table for polynomial 0x04c11db7
static u_long crc_table[256] = {
0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4};
u_long crc32 (char *data, int len)
{
register int i;
u_long crc = 0xffffffff;
for (i=0; i<len; i++)
crc = (crc << 8) ^ crc_table[((crc >> 24) ^ *data++) & 0xff];
return crc;
}
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